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Cosmic Time Transformations in Cosmological Relativity 被引量:1
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作者 Firmin J. Oliveira 《Journal of High Energy Physics, Gravitation and Cosmology》 2016年第2期253-279,共27页
The relativity of cosmic time is developed within the framework of Cosmological Relativity in five dimensions of space, time and velocity. A general linearized metric element is defined to have the form , where the co... The relativity of cosmic time is developed within the framework of Cosmological Relativity in five dimensions of space, time and velocity. A general linearized metric element is defined to have the form , where the coordinates are time , radial distance for spatials x, y and z, and velocity v, with c the speed of light in vacuum and t the Hubble-Carmeli time constant. The metric is accurate to first order in and v/c . The fields and are general functions of the coordinates. By showing that =, a metric of the form is obtained from the general metric, implying that the universe is flat. For cosmological redshift z, the luminosity distance relation is used to fit combined distance moduli from Type 1a supernovae up to z is obtained for the matter density parameter at the present epoch. Assuming a baryon density of , a rest mass energy of (9.79+ 0.47) GeV is predicted for the anti-baryonic and the particles which decay from a hypothetical particle. The cosmic aging function makes good fits to light curve data from two reports of Type 1a supernovae and in fitting to simulated quasar like light curve power spectra separated by redshift . We determine the multipole of the first acoustic peak of the Cosmic Microwave Background radiation anisotropy to be and a sound horizon of on today’s sky. 展开更多
关键词 Flat Space cosmic time time Dilation Dark Matter
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The Relativity of Cosmic Time: The Universe Is a Black Hole
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作者 Pascal Churoux 《Journal of Modern Physics》 2015年第13期1840-1851,共12页
Up to now, cosmology metrics have been based on Einstein relativity, established in 1905. Hubble has discovered the correlation between redshift and distance. Cosmology interprets the redshift as an expansion effect a... Up to now, cosmology metrics have been based on Einstein relativity, established in 1905. Hubble has discovered the correlation between redshift and distance. Cosmology interprets the redshift as an expansion effect a(t) through the ΛCDM model. We have proposed a new theory to explain Hubble law. The theory has been validated against observation data. It proposes a new approach of time which introduces the cosmic time tc. Cosmic time is an absolute reference to universe. It is zero at the edge with tc = 0, tc = T at the observer position and tc = s for any source between the edge and the observer, with T > s > 0. This theory acts like the relativity of space-time. The redshift is interpreted as a perspective parameter p(tc) = tc/T. Using gravitation, it is the Einstein effect applied to the uni-verse. This paper comments and interprets further consequences of this new theory. We emphasize the difference between duration (as usually used in classical cosmologic metrics) and the cosmic time tc as a notion of date. It induces two related effects: relativity of speed of light and time stretching. We explain why the cosmological standard model is not well suited to describe the Hubble law, to describe the universe. We also explain why gravitation and temperature increase when going from the center to the edge of the universe, when going from present to birth. The model has no use of black energy. As a consequence, the universe is seen as a black hole created by the cosmic time shock wave when tc = 0. 展开更多
关键词 HUBBLE Law Space-time RELATIVITY Light Speed UNIVERSE Expansion REDSHIFT Big Bang Black Hole cosmic time
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Cosmic Time as an Emergent Property of Cosmic Thermodynamics
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作者 Eugene Terry Tatum U. V. S. Seshavatharam 《Journal of Modern Physics》 2018年第10期1941-1945,共5页
This paper, in conjunction with recent Flat Space Cosmology (FSC) publications, provides theoretical support for cosmic time being an emergent property of cosmic entropy and temperature. Therefore, if Verlinde’s “em... This paper, in conjunction with recent Flat Space Cosmology (FSC) publications, provides theoretical support for cosmic time being an emergent property of cosmic entropy and temperature. Therefore, if Verlinde’s “emergent gravity” theory is correct, both time and gravity are most fundamentally emergent properties of cosmic thermodynamics. Since emergent properties within complex systems with a huge number of degrees of freedom are often not definable at the smallest scales, these results suggest that quantum time and quantum gravity may be no more definable than consciousness within two connecting neurons. String theorists now struggling to define quantum space-time and quantum gravity should bear this in mind. 展开更多
关键词 Flat Space COSMOLOGY COSMOLOGY Theory Emergent Gravity DARK Matter cosmic Entropy Entropic ARROW of time Universal Temperature Black HOLES
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COSMIC大气掩星与SABER/TIMED探测温度数据比较 被引量:17
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作者 宫晓艳 胡雄 +1 位作者 吴小成 肖存英 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2013年第7期2152-2162,共11页
本文利用2009年1月—2011年12月共3年的COSMIC大气掩星观测数据与SABER/TIMED探测数据开展15~60km大气温度数据的比较分析研究,计算COSMIC与SABER/TIMED探测温度的绝对偏差(TSABER-TCOSMIC),并统计其平均温度偏差和标准偏差,分析温度... 本文利用2009年1月—2011年12月共3年的COSMIC大气掩星观测数据与SABER/TIMED探测数据开展15~60km大气温度数据的比较分析研究,计算COSMIC与SABER/TIMED探测温度的绝对偏差(TSABER-TCOSMIC),并统计其平均温度偏差和标准偏差,分析温度偏差随高度、纬度和季节的分布特征,为COSMIC大气掩星与SABER/TIMED探测数据的应用提供更多的参考依据.结果表明:COSMIC与SABER/TIMED数据所反映的温度随高度的变化特征是一致的,数据的大体趋势吻合较好.全球范围的平均温度偏差在38km左右接近于0K,在38km以上,平均温度偏差表现为负的系统性偏差,且随着高度逐渐增大,在38km以下,平均温度偏差表现为正的系统性偏差,在23km左右存在极大值,约为2.7K.COSMIC与SABER/TIMED温度偏差的分布存在着随纬度和季节的变化特征,35km以下,平均温度偏差在高纬地区和冬季较小,低纬地区和夏季较大,35km以上,平均温度偏差在高纬地区和冬季较大,低纬地区和夏季较小.温度偏差的标准偏差在低纬地区和夏季较小,高纬地区和冬季较大.纬圈平均的温度偏差在南北半球的分布基本呈对称结构. 展开更多
关键词 cosmic 大气掩星 SABER timeD 温度 比较
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Pinched Material Einstein Space-Time Produces Accelerated Cosmic Expansion
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作者 M. S. El Naschie 《International Journal of Astronomy and Astrophysics》 2014年第1期80-90,共11页
An instructive analogy between the deformation of a pinched elastic cylindrical shell and the anti-gravity behind accelerated cosmic expansion is established. Subsequently the entire model is interpreted in terms of a... An instructive analogy between the deformation of a pinched elastic cylindrical shell and the anti-gravity behind accelerated cosmic expansion is established. Subsequently the entire model is interpreted in terms of a hyperbolic fractal Rindler space-time leading to the same robust results regarding real energy and dark energy being 4.5% and 95.5% respectively in full agreement with all recent cosmological measurements. 展开更多
关键词 Dark Energy Rindler SPACE-time CARTAN Torsion Pinched Elastic Shells Negative Gravity cosmic ACCELERATED EXPANSION Fractal SPACE-time Topological Defects Hardy’s Quantum Entanglement Hawking’s Radiation COSSERAT Elasticity
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COSMIC-2近实时廓线反演对流层延迟及其质量分析 被引量:1
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作者 胡方鑫 叶世榕 +3 位作者 罗佳 夏朋飞 曾旭平 马鑫程 《导航定位学报》 CSCD 北大核心 2024年第5期27-35,共9页
为了进一步提高全球大气探测和极端天气预报的精度,提出一种气象、电离层与气候星座观测系统2代(COSMIC-2)近实时廓线反演对流层延迟方法:指出随着气象、电离层与气候星座观测系统2代(COSMIC-2)掩星探测深度的加深,通过掩星手段为地表... 为了进一步提高全球大气探测和极端天气预报的精度,提出一种气象、电离层与气候星座观测系统2代(COSMIC-2)近实时廓线反演对流层延迟方法:指出随着气象、电离层与气候星座观测系统2代(COSMIC-2)掩星探测深度的加深,通过掩星手段为地表全球卫星导航系统(GNSS)观测站提供近实时先验天顶对流层延迟(ZTD)产品成为可能;采用COSMIC-2掩星Level 2近实时产品wetPf2大气湿度廓线获取掩星ZTD,并以欧洲中期数值天气预报中心第五代再分析资料(ERA5)作为参考,分高程、纬度、季节评估其反演精度。结果表明,COSMIC-2掩星反演天顶对流层延迟ZTD整体精度较高,10 km高程以下全球定位系统(GPS)信号反演ZTD精度较格洛纳斯卫星导航系统(GLONASS)信号更优;掩星反演ZTD精度随高程增加而提升,在0~1 km高程范围内精度最低,均方根(RMS)分别为11.33 mm(GPS)、11.54 mm(GLONASS);中低纬度区域(25°N—35°N)反演ZTD精度低于低纬(15°N—25°N)和中纬(35°N—45°N)区域,其中中纬区域精度最高,RMS分别为4.74 mm(GPS)、4.70 mm(GLONASS);掩星反演ZTD精度同样受季节影响,GPS/格洛纳斯全球卫星导航系统(GLONASS)双模信号均在夏季反演精度最差,冬季反演精度最高,冬季RMS分别为4.15 mm(GPS)、4.18 mm(GLONASS)。 展开更多
关键词 气象、电离层与气候星座观测系统2代(cosmic-2) 全球卫星导航系统(GNSS)近实时掩星 天顶对流层延迟 质量分析
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Thoughts Concerning the Origin of Our Fractal Universe
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作者 J. C. Botke 《Journal of Modern Physics》 2025年第1期167-197,共31页
During the past few decades, it has become clear that the distribution, sizes, and masses of cosmic structures are best described as fractal rather than homogeneous. This means that an entirely different formalism is ... During the past few decades, it has become clear that the distribution, sizes, and masses of cosmic structures are best described as fractal rather than homogeneous. This means that an entirely different formalism is needed to replace the standard perturbation model of structure formation. Recently, we have been developing a model of cosmology that accounts for a large number of the observed properties of the universe. A key component of this model is that fractal structures that later regulated the creation of both matter and radiation came into existence during the initial Planck-era inflation. Initially, the vacuum was the only existence and since time, distance, and energy were uncertain, its only property, the curvature (or energy), was most likely distributed randomly. Everything that happened after the Planck era can be described by the known laws of physics so the remaining fundamental problem is to discover how such a random beginning could organize itself into the hierarchy of highly non-random self-similar structures on all length scales that are necessary to explain the existence of all cosmic structures. In this paper, we present a variation of the standard sandpile model that points to a solution. Incidental to our review of the distributions of cosmic structures, we discovered that the apparent transition from a fractal to a homogeneous distribution of structures at a distance of about 150 Mpc is a consequence of the finite size of the universe rather than a change in the underlying statistics of the distributions. 展开更多
关键词 Early Universe Fractal Distributions NUCLEOSYNTHESIS cosmic Structures time-Varying Curvature
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Flat Space Cosmology as a Model of Light Speed Cosmic Expansion—Implications for the Vacuum Energy Density
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作者 Eugene Terry Tatum U. V. S. Seshavatharam 《Journal of Modern Physics》 2018年第10期2008-2020,共13页
Cosmologists have long ignored a stipulation by quantum field theorists that the vacuum pressure p corresponding to the zero-state vacuum energy must always be equal in magnitude to the vacuum energy density &rho;... Cosmologists have long ignored a stipulation by quantum field theorists that the vacuum pressure p corresponding to the zero-state vacuum energy must always be equal in magnitude to the vacuum energy density &rho;(i.e., p=&rho;). Although general relativity stipulates the additional condition of proportionality between the vacuum gravitational field and (&rho;+3p), the equation of state for the cosmic vacuum must fulfill both relativistic and quantum stipulations. This paper fully integrates Flat Space Cosmology (FSC) into the Friedmann equations containing a cosmological term, with interesting implications for the nature of dark energy, cosmic entropy and the entropic arrow of time. The FSC vacuum energy density is shown to be equal to the cosmic fluid bulk modulus at all times, thus meeting the quantum theory stipulation of (p=&rho;). To date, FSC is the only viable dark energy cosmological model which has fully-integrated general relativity and quantum features. 展开更多
关键词 COSMOLOGY Theory General RELATIVITY Dark Energy cosmic Flatness cosmic Entropy Entropic ARROW of time cosmic Inflation MILNE Universe Black Holes COSMOLOGICAL Constant Problem
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Dark Experiments: From Black Holes to Cosmic Rays
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作者 Allen D. Allen 《Journal of Modern Physics》 2012年第9期955-956,共2页
Some nagging questions in modern physics can be resolved rigorously using a basic mathematical formalism, albeit with the need to admit that non-isomorphic realities arise to various degrees in a given universe. Let U... Some nagging questions in modern physics can be resolved rigorously using a basic mathematical formalism, albeit with the need to admit that non-isomorphic realities arise to various degrees in a given universe. Let U=(m', m') be an unordered pair of distinct massive objects in different reference frames. A dark experiment is an ordering u, mv> of the elements of U, either or, exclusively, , where the left-hand member of the ordered pair is called the observer, and where there exists a 1-to-1 mapping f:{u}→{events}, mv> , such that both elements of an ordered pair in a dark experiment agree on the events that unfold in the experiment. However, since ≠ , it follows that f()≠f(). This describes non-isomorphic realities where in both elements of each ordered pair mapping two distinct sets of unfolding events will agree on their respective events. Consequently, there is an inherent limitation on what can be determined directly from experimentation. Examples arise in the context of the Hawking information paradox, relativistic time travel, and cosmic ray experiments. 展开更多
关键词 Experimental Physics Physical Reality Hawking Information PARADOX cosmic RAYS Relativistic time Travel LORENTZ CONTRACTION Cosmology
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The Common Topological Origin of Waves in Quantum and Photon Physics as Well as in the Cosmic Redshift
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作者 Ernst Karl Kunst 《Natural Science》 2022年第2期94-116,共23页
It is shown that the well-known wave behaviors of material particles and photons, as well as the newly discovered wave-like structures in the cosmic redshift, are related phenomena that follow conclusively when sender... It is shown that the well-known wave behaviors of material particles and photons, as well as the newly discovered wave-like structures in the cosmic redshift, are related phenomena that follow conclusively when senders and receivers of photons or material particles are topologically located in manifolds with a dimension difference of one. In this context, the inertial mass of the proton and the electron, their spin properties and the cause of time are derived from basic topological and physical laws. In addition, the quantum geometric basis of relativistic time dilation, the basis of the relativistic energy-momentum relationship and the relationship between energy and time are shown. Finally, it is shown that a curved cosmic space causes a distance-dependent reddening of light and the associated apparent escape velocity of distant cosmic objects, and that this also leads to a topologically conditioned wave structure of this redshift. 展开更多
关键词 Waves in Particle and Photon Physics cosmic-Redshift Wavelike Pattern Topological Interpretation Cause of Mass and time
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The World in an Equation: A Reappraisal of the Lemaître’s Primeval Cosmic Rays
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作者 Russell Bagdoo 《Journal of Modern Physics》 2019年第8期922-952,共31页
Based on radioactive phenomena (weak force), Georges Lema&icirc;tre conceives, as soon as 1927, the primeval universe as a “unique super-dense quantum”, whose disintegration gave birth to all the current compone... Based on radioactive phenomena (weak force), Georges Lema&icirc;tre conceives, as soon as 1927, the primeval universe as a “unique super-dense quantum”, whose disintegration gave birth to all the current components of the universe [1] [2]. Using quantum mechanics, he proposes to explain the origins of the world from the point of view of quantum theory. He believes to find in the cosmic rays the manifestation of the initial fragmentation. However, regardless of the adopted cosmology, the hypothesis of the primeval atom (cold big bang) had no equation to support it and was not retained. Like all other cosmologists, he fell back on the Friedmann-Einstein equation with a repulsive cosmological constant which, according to supernova observations at the end of the millennium, propels expansion towards infinity. We juxtapose our equation of “quantum cosmology” to this equation of relativistic cosmology. We have already proposed this equation in an earlier paper [3], which has its source in quantum mechanics and fits Lema&icirc;tre’s hypothesis of the “primeval atom”. It’s an equation in which the concept of matter-space-time is mathematically connected;gravitation and electromagnetism are also bound by space-time. A mechanism is described showing how velocity, time, distance, matter and energy, are correlated. We are led to ascertain that gravity and electricity are two distinct manifestations of a single underlying process: electrogravitation. For the first time, the cosmological time, considered as a real physical object, is integrated into a “cosmological equation” which makes coherent what we know regarding the time (its origin, its flow…), the matter and the space. Moreover, the equation indicates a constantly decelerated expansion. The concentration of the material medium and the importance of the decreasing energy of the vacuum contribute to the progressive increase of the positive pressure which becomes responsible for the increasing deceleration of the expansion. Does this mean that our equation leads us inevitably to the hypothesis of the primeval atom for the whole cosmos? Certainly not, since our model includes both the hot Gamow model and the cold Lema&icirc;tre model. The term “dynamic evolution” (used in the beginning by specialists for big bang models) is appropriate for our model since there is both an explosive origin and, throughout the expansion, a disintegration of a hyper-dense matter. The discovery of cosmic microwave background radiation has confirmed the hot big bang model that Gamow and his team have achieved. The predicted light prevailed over the primitive cosmic rays (particles) suggested by Lemaitre. Nevertheless, we think that Lemaitre was also right. The so-called big bang theory (singular cataclysmic explosion), in addition to not meeting basic criteria of science, is contradicted by several observations that are ignored. For example, the work of Armenian astronomers has convinced us that the origin of cosmic particles results not only from supernova explosions, but also from the partition of radio galaxies, not only from the death of the world, but also from their birth. 展开更多
关键词 Theory of Relation IRREVERSIBLE COSMOLOGICAL time π DECELERATION New Variable Quantum Cosmology Primeval Atom cosmic RAYS
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人法地,地法天,天法道,道法自然——中国风景园林中的师法自然观 被引量:3
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作者 李金路 欧阳高奇 《中国园林》 CSCD 北大核心 2024年第8期12-17,共6页
中国风景园林充分反映了中华民族的师法自然观。中国传统文化中的人、山水、地、天、道、元气、宇宙诸多概念表达出多维度的自然;“人法地,地法天,天法道,道法自然”,系统论述从人到自然之间诸多层次的师法关系。中国风景园林则在从人... 中国风景园林充分反映了中华民族的师法自然观。中国传统文化中的人、山水、地、天、道、元气、宇宙诸多概念表达出多维度的自然;“人法地,地法天,天法道,道法自然”,系统论述从人到自然之间诸多层次的师法关系。中国风景园林则在从人到自然的多层次关系中,通过自然崇拜、君子比德、模山范水、人做天开、宇宙浓缩等诸多形式最终落脚到师法自然,这就使得中国风景园林形成了“外师造化、内得心源”的认识方法、“虽由人作,宛自天开”的价值取向、阴阳和谐山水格局的空间营造手法,以及自然而然的宇宙再现。中国风景园林能艺术地凝练出有形自然、无形自然、万物演化规律的自然和体现宇宙法则的自然,师法自然观在其衍化过程中留下了深深的痕迹。 展开更多
关键词 风景园林 师法自然 宇宙时空 阴阳
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临近空间卫星探测温度数据的精度评估 被引量:3
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作者 范志强 罗杰 +2 位作者 石汉青 姜祝辉 刘珏 《解放军理工大学学报(自然科学版)》 EI 北大核心 2014年第2期178-183,共6页
为综合分析评估中国区域内临近空间卫星遥感探测的温度数据精度,利用2006年4月至2009年12月的COSMIC掩星探测数据与TIMED/SABER卫星探测数据进行对比分析,计算2种卫星数据之间的平均温度偏差和温度标准差,并统计分析随季节和纬度分... 为综合分析评估中国区域内临近空间卫星遥感探测的温度数据精度,利用2006年4月至2009年12月的COSMIC掩星探测数据与TIMED/SABER卫星探测数据进行对比分析,计算2种卫星数据之间的平均温度偏差和温度标准差,并统计分析随季节和纬度分布的温度偏差特征。对比统计结果表明,中国区域内2种卫星遥感探测数据的温度随高度变化的特征总体一致;其平均温度偏差均在2K以上,在15km附近偏差较大,在37~57km内平均温度偏差以约0.22K/km的速度随高度递增;同时,平均温度偏差在夏季最小,冬季最大,在35~60km内季节的变化对温度偏差影响较大,且温度偏差随纬度的变化在不同高度范围内呈现不同的分布特征。此次评估综合分析了COSMIC与TIMED/SABER在中国区域内的温度数据精度,能够为临近空间卫星探测数据在国内的应用提供一定的参考依据。 展开更多
关键词 卫星探测 cosmic timeD SABER 精度评估
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MRPC宇宙线测试技术研究 被引量:1
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作者 王义 高原宁 +5 位作者 程建平 李元景 贾怀茂 来永芳 岳骞 李金 《核电子学与探测技术》 CAS CSCD 北大核心 2006年第5期572-575,共4页
采用宇宙线测试系统,同时测量两个空间位置对齐的多气隙电阻板室。采用两种不同的事例挑选方法对两个室的性能进行了分析。结果表明,当选取近乎垂直入射的事例时,MRPC的时间分辨、雪崩信号比例等各项性能均得到提高。还研究了pad间串扰... 采用宇宙线测试系统,同时测量两个空间位置对齐的多气隙电阻板室。采用两种不同的事例挑选方法对两个室的性能进行了分析。结果表明,当选取近乎垂直入射的事例时,MRPC的时间分辨、雪崩信号比例等各项性能均得到提高。还研究了pad间串扰对MRPC性能的影响。 展开更多
关键词 MRPC 宇宙线 时间分辨 串扰
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基于FPGA与GPS的时间测量电路设计与实现 被引量:8
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作者 尹俊 倪发福 +6 位作者 张建川 李运杰 郑洋德 白晓 张亚鹏 张鹏鸣 王彦瑜 《原子能科学技术》 EI CAS CSCD 北大核心 2019年第1期151-157,共7页
为宇宙射线缪子(μ子)测量实验设计了基于FPGA的高精度时间-数字转换器(TDC),结合TDC测量值与GPS提供的标准时间(UTC)精确记录了粒子事件的时间信息。TDC采用粗计数+细时间测量相结合的方式,用计数器实现动态范围大于1 s的粗时间测量;使... 为宇宙射线缪子(μ子)测量实验设计了基于FPGA的高精度时间-数字转换器(TDC),结合TDC测量值与GPS提供的标准时间(UTC)精确记录了粒子事件的时间信息。TDC采用粗计数+细时间测量相结合的方式,用计数器实现动态范围大于1 s的粗时间测量;使用FPGA加法进位延时链构建时间内插完成了细时间测量,并借助Wave-Union与bin-by-bin方法提高时间分辨并改善非线性。实验室测试双边沿TDC的时间分辨为16.68 ps,时间测量精度(RMS)好于45 ps。测量结果表明,该TDC满足脉冲前沿时间甄别要求。 展开更多
关键词 宇宙射线缪子测量 FPGA 时间-数字转换器 GPS
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侏罗-白垩纪地球圈层演化节律及相互关系 被引量:15
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作者 刘本培 张世红 《地学前缘》 EI CAS CSCD 1997年第3期65-74,共10页
文章根据国内外近年多学科研究新成果,结合东亚燕山构造阶段经典地区陆相地层特征,重点评述了全球中侏罗至早白垩世地质年代表存在的问题,提出了与国际海相分阶、二级层序地层界面、磁性地层和较合理的同位素年龄值相协调的陆相地层... 文章根据国内外近年多学科研究新成果,结合东亚燕山构造阶段经典地区陆相地层特征,重点评述了全球中侏罗至早白垩世地质年代表存在的问题,提出了与国际海相分阶、二级层序地层界面、磁性地层和较合理的同位素年龄值相协调的陆相地层划分对比方案。在此基础上探讨了地球岩石圈、水圈、气圈、生物圈以及地外宇宙圈演化节律和耦合关系,指出本阶段中地球各圈层演化节律间的一些差异性和不确定性,显示了地球历史节律中规律性和随机性的辩证统一。 展开更多
关键词 侏罗纪 白垩纪 地球圈层 演化节律 相互关系
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宇宙线对地球气候的影响 被引量:7
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作者 贾焕玉 《原子核物理评论》 CAS CSCD 北大核心 2004年第3期218-224,共7页
对宇宙线影响地球气候的一些观测结果和物理机制的研究进行了总结和概述,主要讨论了宇宙线对大气中化学反应、云形成过程等的影响,并给出了羊八井宇宙线观测站对宇宙线流强和大气参量日变化的初步观测结果.
关键词 地球气候 宇宙线 羊八井宇宙线观测站 时间变化 关联
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宇宙线暴时增加及其特征 被引量:4
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作者 叶宗海 孙小青 《空间科学学报》 CAS CSCD 北大核心 1992年第4期270-278,共9页
利用11个地面超中子堆的资料分析了6个不同地磁暴期间由于赤道环电流增强引起的暴时增加,并分析了它们的特征。结果表明,地磁暴愈强,暴时增加愈明显。暴时增加与地磁H分量的变化有很好的负相关,并有明显的纬度效应或与地磁截止刚度有依... 利用11个地面超中子堆的资料分析了6个不同地磁暴期间由于赤道环电流增强引起的暴时增加,并分析了它们的特征。结果表明,地磁暴愈强,暴时增加愈明显。暴时增加与地磁H分量的变化有很好的负相关,并有明显的纬度效应或与地磁截止刚度有依赖关系。北京地区是暴时增加相当明显的区域。暴时增加还有明显的地方时依赖关系。在白昼一侧的增加更大,表明环电流具有不对称性的特征。 展开更多
关键词 宇宙线 暴时增加 环电流 地磁暴
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AdS^5S^5宇宙时空中世界面能量的计算 被引量:1
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作者 颜骏 《四川师范大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第6期744-746,共3页
计算了AdS^5S^5宇宙时空中具有作用项的世界面能量,发现能量决定于世界面空间长度L,并呈f(1/L)关系.这一结论表明高维时空中世界面能量不同于通常的夸克与反夸克对的势能.
关键词 AdS5×S5宇宙时空 世界面 能量
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2001年11月24日特大磁暴前银河宇宙线短时间尺度功率谱分析 被引量:5
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作者 乐贵明 叶宗海 龚菊红 《中国科学院研究生院学报》 CAS CSCD 2002年第2期163-167,共5页
采用北京宇宙线超中子堆 5min的数据,利用快速傅里叶变换计算宇宙线的功率谱方法,分析了 2 0 0 1年 1 1月 2 4日特大磁暴前银河宇宙线短时间尺度(t<1h)的功率谱。计算结果表明,在 2 0 0 1年 1 1月 1 8日到 2 0日之间,银河宇宙线的功... 采用北京宇宙线超中子堆 5min的数据,利用快速傅里叶变换计算宇宙线的功率谱方法,分析了 2 0 0 1年 1 1月 2 4日特大磁暴前银河宇宙线短时间尺度(t<1h)的功率谱。计算结果表明,在 2 0 0 1年 1 1月 1 8日到 2 0日之间,银河宇宙线的功率谱没有特别突出的特征。在 2 0 0 1年 1 1月 2 3日CME抛出之后到达磁层前的一段时间,银河宇宙线的 2 2.61 5 4min的周期非常显著,而其他短时间周期的特征变得很不明显,几乎变为噪声水平。 展开更多
关键词 2001年11月24日 特大磁暴 太阳活动 CME 行星际磁场 银河宇宙线 短时间尺度功率谱
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